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A Single-Center Experience of 2153 Tunneled-Cuffed Catheter Insertions Radiologically Placed via the Internal Jugular Vein: An Evaluation of Technical Success and Complication Rates Relative to Underlying Disease Conditions
Purpose: To evaluate the technical success and complication rates of tunneled-cuffed catheter insertions radiologically placed via the internal jugular vein in patients with different types of underlying diseases. Materials and Methods: A total of 2153 tunneled-cuffed catheter insertions performed in 1926 patients between January 2008 and December 2012 were retrospectively reviewed. All procedures were conducted using sonography and fluoroscopy. The number of catheter maintenance days, technical success rates, and complication rates were analyzed based on radiologic and medical records. Results: A total of 204809 catheter maintenance days (mean, 95.35 days; range, 0–1710 days) were recorded. Technical success was achieved in 2148 insertions (99.77%). A total of 185 complications (8.61%, 0.903/1000 catheter days) were observed, including 22 procedure-related complications (1.02%). A total of 143 catheters (6.66%) were removed due to complications. Significant differences in complication rates were observed between patients with or without underlying hematologic diseases (11.65% vs. 7.02%, respectively; p = 0.000). Significant differences in catheter thrombosis were observed between patients in which right-sided or left-sided venous approaches were used (0.81% vs. 2.70%, respectively; p = 0.010). Conclusion: The very high technical success rates and very low procedure-related complication rates indicate insertion of a tunneled-cuffed catheter radiologically placed via the internal jugular vein is safe and effective.
A new micro porous patterning method was proposed in this paper. We experimentally demonstrated the feasibility of this method using UV laser hybrid process with polymer sheet. The PP(Polypropylene) sheet of 0.1mm thickness was firstly mixed with CFA(Chemical Foaming Agent), and then the desired porous pattern was selectively fabricated by 355nm UV pulse laser processing. According to processes parameters such as laser fluence, processing time and CFA density, the characteristic of porosity which is pore size, pore density and pore type was proven to be controllable. From these experimental results, it was possible to manufacture micro porous patterned polymer sheet.
Reaction bonded silicon nitride (RBSN) has been fabricated from Si powder with cordierite as a sintering aid. A nitridation rate of more than 90% was obtained in each specimen. As the amount of cordierite was increased, the nitridation rates decreased. Both α-Si3N4 and β-Si3N4 were formed during the nitridation of silicon to Si3N4. There were more beta crystals in the specimens with a higher cordierite content. The relative densities increased when the amount of cordierite increased. A Fracture toughness of 3.59±0.28 MPa-m1/2 was obtained for the specimen containing 18 wt% cordierite sintered at 1800 οC for 3 hours.